Port22— SSH / SFTP
OpenSSH écoute par défaut sur TCP 22. Son sous-système SFTP transfère les fichiers via SSH, et non via le protocole historique attribué au port 115.
Registry assignments, software defaults and local listeners are different things. A port number alone does not identify or secure a service.
Configuration and troubleshooting
Examinez Port et ListenAddress dans sshd_config. Conservez la session actuelle et un accès à la console pendant la validation, puis testez une deuxième connexion avant de vous déconnecter.
Important limitations
Changer de port ne remplace ni l’authentification ni le contrôle d’accès. Ne désactivez pas la vérification de la clé d’hôte pour contourner des échecs de connexion.
Read-only checks: run on the server host
Choose the commands for your OS. Check TCP and UDP separately. No result is not a lasting availability guarantee; inspect host and container separately.
Linux
sudo ss -ltnp 'sport = :22'macOS
sudo lsof -nP -iTCP:22 -sTCP:LISTENWindows PowerShell
Get-NetTCPConnection -LocalPort 22 -State ListenSources and review
Sources checked on:
This review covers the explanations and sources on this page, not your device or every community software entry below.
Related troubleshooting guides
Logiciels utilisant ce port (3 logiciels)
Community software entries: links are references, not individual verification.
Conseils d’utilisation
- Avant d’utiliser le port 22, vérifiez qu’il n’est pas occupé par d’autres services
- En cas de conflit de ports, envisagez d’utiliser d’autres ports ou d’arrêter le service qui occupe le port
Questions fréquentes
What is port 22 used for?
Port 22 sits in the File Sharing category. This page lists the registered purpose and the software commonly associated with it; to see what is actually listening on a specific machine, check the process with ss/netstat.
Is port 22 TCP or UDP?
The registered protocol on this page is TCP. The same number behaves independently on each protocol: TCP may be listening while UDP is idle, so check them separately.
How do I check if port 22 is in use?
On Linux: sudo ss -tlnp 'sport = :22' for an exact port match. On macOS: sudo lsof -nP -iTCP:22 -sTCP:LISTEN. On Windows PowerShell: Get-NetTCPConnection -LocalPort 22 -State Listen. A listener counts as confirmed only when you can see the bind address and process name; without root/admin you will not see other users' processes.
Is port 22 secure? Should I open it in my firewall?
A port number has no inherent security — it depends on whether the listening service is correctly configured and whether it needs exposure at all. Keep loopback/internal-only services firewalled; where public access is required, pair it with source restrictions, VPN or authentication. The caution section on this page lists port-specific risks.
En bref
- Port
- 22
- Protocole
- TCP
- Catégories
- Partage de fichiers
- État d’utilisation
- 3 logiciels utilisant ce port
Ports associés
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